FIBER REINFORCED CERAMICS: A REVIEW AND ASSESSMENT OF THEIR POTENTIAL.
Abstract
This report presents a review of previous work in fiber reinforced ceramics and possible matrix fiber combinations are discussed. It is shown that despite a number of virtues of fiber reinforced ceramics, as demonstrated with model materials, the present technology has been unable to capitalize on this approach to achieve more thermally shock resistant ceramics having predictable mechanical integrity. This inability to extrapolate model behavior to 'real' or technologically interesting materials is considered and found to stem from several factors, the most important being thermochemical interaction, cracking, and reinforcement oxidation. Low temperature processing as well as the use of coated filaments are indicated as potential solutions to useful reinforced ceramics. Additionally, the need for studies of the micromechanics of reinforced ceramics is indicated as is the need for studies of subsolidus kinetics in some systems. Thermochemical compatibility features are discussed in detail for many reinforcement-matrix combinations and approaches as well as the utility and limitations of some combinations are indicated. Filaments of chromium and transition metal borides and beryllides, all of which are presently unavailable, are noted as offering potential solutions to some presently indicated problems. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0824938
Entities
People
- J. J. Krochmal
Organizations
- Air Force Research Laboratory